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Simplify implementation, and probably speed things up too.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11308 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-11 03:57:16 +00:00
parent 723c66d4c0
commit 40c5767b70
1 changed files with 6 additions and 9 deletions
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15
lib/Analysis/ValueNumbering.cpp
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@ -15,9 +15,9 @@
#include "llvm/Analysis/ValueNumbering.h"
#include "llvm/Support/InstVisitor.h"
#include "llvm/BasicBlock.h"
#include "llvm/Instructions.h"
#include "llvm/Pass.h"
#include "llvm/Type.h"
#include "llvm/iMemory.h"
namespace llvm {
@ -104,17 +104,14 @@ void BVNImpl::visitCastInst(CastInst &CI) {
for (Value::use_iterator UI = Op->use_begin(), UE = Op->use_end();
UI != UE; ++UI)
if (Instruction *Other = dyn_cast<Instruction>(*UI))
// Check to see if this new cast is not I, but has the same operand...
if (Other != &I && Other->getOpcode() == I.getOpcode() &&
Other->getOperand(0) == Op && // Is the operand the same?
if (CastInst *Other = dyn_cast<CastInst>(*UI))
// Check that the types are the same, since this code handles casts...
if (Other->getType() == I.getType() &&
// Is it embedded in the same function? (This could be false if LHS
// is a constant or global!)
Other->getParent()->getParent() == F &&
// Check that the types are the same, since this code handles casts...
Other->getType() == I.getType()) {
// Check to see if this new cast is not I.
Other != &I) {
// These instructions are identical. Add to list...
RetVals.push_back(Other);
}